/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.pipe.event.common.deletion;

import org.apache.iotdb.commons.audit.UserEntity;
import org.apache.iotdb.commons.consensus.index.ProgressIndex;
import org.apache.iotdb.commons.consensus.index.impl.MinimumProgressIndex;
import org.apache.iotdb.commons.pipe.agent.task.meta.PipeTaskMeta;
import org.apache.iotdb.commons.pipe.datastructure.pattern.TablePattern;
import org.apache.iotdb.commons.pipe.datastructure.pattern.TreePattern;
import org.apache.iotdb.commons.pipe.event.EnrichedEvent;
import org.apache.iotdb.commons.pipe.event.SerializableEvent;
import org.apache.iotdb.db.auth.AuthorityChecker;
import org.apache.iotdb.db.pipe.consensus.deletion.DeletionResource;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.PlanNodeType;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.AbstractDeleteDataNode;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.DeleteDataNode;
import org.apache.iotdb.db.queryengine.plan.planner.plan.node.write.RelationalDeleteDataNode;
import org.apache.iotdb.db.queryengine.plan.relational.metadata.QualifiedObjectName;
import org.apache.iotdb.db.storageengine.dataregion.modification.TableDeletionEntry;

import org.apache.tsfile.utils.ReadWriteIOUtils;

import java.nio.ByteBuffer;
import java.util.Optional;

public class PipeDeleteDataNodeEvent extends EnrichedEvent implements SerializableEvent {
  private AbstractDeleteDataNode deleteDataNode;
  private DeletionResource deletionResource;
  private boolean isGeneratedByPipe;
  private ProgressIndex progressIndex;

  public PipeDeleteDataNodeEvent() {
    // Used for deserialization
    this(null, false);
  }

  public PipeDeleteDataNodeEvent(
      final AbstractDeleteDataNode deleteDataNode, final boolean isGeneratedByPipe) {
    this(deleteDataNode, null, 0, null, null, null, null, null, null, true, isGeneratedByPipe);
  }

  public PipeDeleteDataNodeEvent(
      final AbstractDeleteDataNode deleteDataNode,
      final String pipeName,
      final long creationTime,
      final PipeTaskMeta pipeTaskMeta,
      final TreePattern treePattern,
      final TablePattern tablePattern,
      final String userId,
      final String userName,
      final String cliHostname,
      final boolean skipIfNoPrivileges,
      final boolean isGeneratedByPipe) {
    super(
        pipeName,
        creationTime,
        pipeTaskMeta,
        treePattern,
        tablePattern,
        userId,
        userName,
        cliHostname,
        skipIfNoPrivileges,
        Long.MIN_VALUE,
        Long.MAX_VALUE);
    this.isGeneratedByPipe = isGeneratedByPipe;
    this.deleteDataNode = deleteDataNode;
    Optional.ofNullable(deleteDataNode)
        .ifPresent(node -> this.progressIndex = deleteDataNode.getProgressIndex());
    addOnCommittedHook(this::decreaseDeletionReference);
  }

  public AbstractDeleteDataNode getDeleteDataNode() {
    return deleteDataNode;
  }

  public DeletionResource getDeletionResource() {
    return deletionResource;
  }

  public void setDeletionResource(final DeletionResource deletionResource) {
    this.deletionResource = deletionResource;
  }

  @Override
  public boolean internallyIncreaseResourceReferenceCount(final String holderMessage) {
    return true;
  }

  @Override
  public boolean internallyDecreaseResourceReferenceCount(final String holderMessage) {
    return true;
  }

  public void decreaseDeletionReference() {
    if (deletionResource != null) {
      deletionResource.decreaseReference();
    }
  }

  @Override
  public ProgressIndex getProgressIndex() {
    return progressIndex == null ? MinimumProgressIndex.INSTANCE : progressIndex;
  }

  @Override
  public EnrichedEvent shallowCopySelfAndBindPipeTaskMetaForProgressReport(
      final String pipeName,
      final long creationTime,
      final PipeTaskMeta pipeTaskMeta,
      final TreePattern treePattern,
      final TablePattern tablePattern,
      final String userId,
      final String userName,
      final String cliHostname,
      final boolean skipIfNoPrivileges,
      final long startTime,
      final long endTime) {
    return new PipeDeleteDataNodeEvent(
        deleteDataNode,
        pipeName,
        creationTime,
        pipeTaskMeta,
        treePattern,
        tablePattern,
        userId,
        userName,
        cliHostname,
        skipIfNoPrivileges,
        isGeneratedByPipe);
  }

  @Override
  public boolean isGeneratedByPipe() {
    return isGeneratedByPipe;
  }

  @Override
  public void throwIfNoPrivilege() {
    if (skipIfNoPrivileges || !(deleteDataNode instanceof RelationalDeleteDataNode)) {
      return;
    }
    for (final TableDeletionEntry entry :
        ((RelationalDeleteDataNode) deleteDataNode).getModEntries()) {
      AuthorityChecker.getAccessControl()
          .checkCanSelectFromTable(
              userName,
              new QualifiedObjectName(
                  ((RelationalDeleteDataNode) deleteDataNode).getDatabaseName(),
                  entry.getTableName()),
              new UserEntity(Long.parseLong(userId), userName, cliHostname));
    }
  }

  @Override
  public boolean mayEventTimeOverlappedWithTimeRange() {
    return true;
  }

  @Override
  public boolean mayEventPathsOverlappedWithPattern() {
    return true;
  }

  @Override
  public ByteBuffer serializeToByteBuffer() {
    final ByteBuffer planBuffer = deleteDataNode.serializeToByteBuffer();
    final ByteBuffer result = ByteBuffer.allocate(Byte.BYTES + planBuffer.limit());
    ReadWriteIOUtils.write(isGeneratedByPipe, result);
    result.put(planBuffer);
    return result;
  }

  @Override
  public void deserializeFromByteBuffer(final ByteBuffer buffer) {
    isGeneratedByPipe = ReadWriteIOUtils.readBool(buffer);
    deleteDataNode = (DeleteDataNode) PlanNodeType.deserialize(buffer);
    progressIndex = deleteDataNode.getProgressIndex();
  }

  public static PipeDeleteDataNodeEvent deserialize(final ByteBuffer buffer) {
    final PipeDeleteDataNodeEvent event = new PipeDeleteDataNodeEvent();
    event.deserializeFromByteBuffer(buffer);
    return event;
  }

  /////////////////////////// Object ///////////////////////////

  @Override
  public String toString() {
    return String.format(
            "PipDeleteDataNodeEvent{progressIndex=%s, isGeneratedByPipe=%s}",
            progressIndex, isGeneratedByPipe)
        + " - "
        + super.toString();
  }

  @Override
  public String coreReportMessage() {
    return String.format(
            "PipeDeleteDataNodeEvent{progressIndex=%s, isGeneratedByPipe=%s}",
            progressIndex, isGeneratedByPipe)
        + " - "
        + super.coreReportMessage();
  }
}
